Hadn’t thought about that, but sure, an office space is typically jammed with people: dozens crowded into cube farms, sales people coming and going, secretaries and bosses, vendors coming in to pitch IT services, janitorial staff or other.
Take the same space, you have maybe 2, possibly 3 apartments, for a total of 6 adults and maybe half a dozen kids. Not going to support the same kinds of coffee shops, convenience stores, and bars. Multiply by 1000 in a skyscraper and you have a very different looking street-level mix of stores.